there are 18 students including boys and girls . if each boys plant 4 trees and each girl plant 5 trees. the total no. they plant the trees is 78. then find the no. of boys and girls
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Let number of boys be x, girls be y
From question:
x+y=18
4x+5y=78
Boys=12,girls=6
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hafeezhtech:
yea you did other way a around
yes you are right
you subtracted in numerator instead of denominator
how did you get 72
please
By multiplying the first equation with -4
x+y )*-4
(x+y = 18)*-4
Yes
:)
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